Title of article :
Primordial helium abundance of the SMC: a view from intermediate mass stars
Author/Authors :
Roberto D. D. Costa، نويسنده , , Walter J. Maciel، نويسنده , , Thais E. P. Idiart، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Pages :
2
From page :
173
To page :
174
Abstract :
Helium abundances were derived for a sample of planetary nebulae of the Small Magellanic Cloud. These abundances were corrected from the chemical evolution of the galaxy as well as from stellar nucleosynthesis, and the primordial helium abundance then was estimated for the sample. Results indicate that the resulting average value for the sample is consistent with the expected values for primordial helium from SBBN and other values derived from HII regions in different stellar systems, even varying the enrichment ratio within its uncertainty range.
Keywords :
ISM: planetary nebulae , galaxies: Magellanic Clouds , stars: abundances
Journal title :
Proceedings of the International Astronomical Union
Serial Year :
2009
Journal title :
Proceedings of the International Astronomical Union
Record number :
675109
Link To Document :
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